Brake-thrust distributor



p 1931- G. L. R. J. MESSIER BRAKE THRUST DISTRIBUTOR Original Filed Aug.2, 1929 cgum INVENTOR Patented Sept. .15, 1 931 UNITED STATES'ZPA'TENTOFFICE GEORGE LOUIS Em JEAN MESSIER, F MONTROUGE, FRANCE BRAKE-THBUSTDISTRIBUTOR.

Original application filed August ,2, 1929, Serial No. ,882,868, and inFrance August 10, 1928. Divided and this application filed June 9, 1931.Serial No. 543,064.

This application is a division of application Serial Number 382,868filed August ,2, 1929.

The present invention relates-to a brake- .a thrust distributor intendedfor Wheeled vehicles of all kinds and more particularly for distributingthe braking actlon between the two wheels of an airplanes undercarriage.

The object of this invention is to provlde a brake-thrust distributorallowing the driver of a vehicle to vary the intensity of the braking ofa wheel relativel to the opposite one so as to facilitate the steeringof said vehicle.

I attain this object by controlling the:

brakes of a wheeled vehicle by the-intermediary of the distributingmeans Illustrated diagrammatically in the accompanying drawings, inwhich: 7

Fi ure 1 shows a first embodiment of sand distnbuting means intended tobe interposed between a main braking lever A and a pair of rods B, Cactuating the respectlvc brakes of a corresponding pair of wheels of thevehicle.

86 Figure 2 shows a second embodiment of said distributin means intendedto be interposed between the connecting rod of a maln braking piston Aand a pair of secondary braking pistons B, C actuating the respec- 80tive brakes of a corresponding pair of wheels of the vehicle.

Figure 3 shows a third embodiment adapted for the braking of anairplanes undercarria e provided with the brake controlling 85 devicedescribed in my parent application,

Serial Number 382,868, from which the present application is a division.

Figure 4 is a detail of Figure 3 shown in" side view.

In the first embodiment (Figure l) the main braking lever A isarticulated at 1 to a link 2 carrying'a roller 3. Said roller rolls on acurved beam 4 interconnecting the two rods B, C, which actuates therespective I. brakes of a pair of wheels (not shown). The

middle of said beam 4 is connected b a link 5 to a fixed pivot 6,secured to the ody of the vehicle, so as to allow it to be shifted inthe direction'of the arrow, when a braking to thrust is applied by thelever A, following a line substantially arallel to the direction of thelever A and o the rods B, C.

The displacement of the roller 3 along the curved concave side of thebeam 4 is controlled by'the intermediary of a connecting rod 7 connectedto the-steering device (not shown) of said vehicle in such a manner thatthe roller 3 is normally located in abutting relation with the middle ofthe beam 4 when the vehicle moves in a straight line.

In this normal position, each brake-thrust applied by the rod A isdivided by the means according to the invention 1 to 7 in two equalstresses which are separately transmitted by the rods B, C to the twowheels of the vehicle. Therefore the braking is at this moment equal oneach of said Wheels.

The connection of said rod 7 with the steering device is devised in sucha manner that the roller 3 is automatically shifted toward the left endof the beam 4 when the vehicle turns to the right or inversely, in orderthat, if the driver then applies the brakes, the braking action isstronger. upon the wheel rotating at a higher speed than upon the op-'posite wheel describing the inner curve, due

to the variations then occurring in the leverage.

In the second embodiment %Figure 2) the lever A and the rods B, C 0Figure 1 are replaced by the pistons A, B, C of three fluid pressuretransmission devices.-

In the third embodiment, the distributing means 3 to 7 of the inventionare interposed between the main cylinders D, E and the secondarycylinders F, G of the fluid-pressure braking device of the undercarriageof an airplane, provided with the brake controlling device described inmy parent application, Serial Number 382,868. The braking action variesaccording to the number of main cylinders (two of which only are shownin which the fluid under pressure is admitted and is transmitted fromthe active plunger pistons A", working in said cylinders, to thedistributiInIg plate integral with a socket I, slidably mounted on aguide K. secured to the undercarriage of the airplane, and of tworollers 8, 9 0 same diameter, rolling on said plate roller 3 by theintermediary of a latter is smallerjtlian -fthe diameter of said rollers8, 9.

The connecting rod.. is provided at one end with a fork 10, carrying.the axis or shaft of the rollers 8, 3,9 and is pivoted at its other endto a suitable point L of the usual bar M, pivoted at N which controlsthe rudder of the air lane.

The a ove described embodiments are given by way of example only, allthe details of construction and execution can be varied withoutdeparting thereby from the principle of the invention.

What I claim is:

1. Brake-thrust distributor of the divided beam type for wheeledvehicles, com rising a divided beam connected by each of its two ends tothe brakes disposed on each side of the vehicle and linked by itsmiddle'to a fixed point of the chassis of the vehicle so as to swingaround said fixed point in a direction substantially parallel to that ofthe braking thrust and means controlled by the. steering device of thevehicle, for varying the ratio of division of said beam accordingtothe'position of said steering device.

2. Brake-thrust distributor of the divided beam type for two wheelvehicles, comprising a divided curved beam connected by its two ends tothe respective brakes of said two wheels and pivoted at its middle to alink, pivotally mounted on the chassis of the vehicle, so as to swingaround the fixed pivot of said link in a direction substantiallyparallelto that of the braking thrust, means for applying the primary brakingthrust at an ad ustabl e power point upon the concave curved side ofsaid beam and means, conbeam type for airplanes undercarriage,comprising a divided curved beam connected by its two ends to therespective brakes of the two wheels of said undercarria e and pivoted byits middle to a link pivotall y mounted on the chassis of saidundercarriage so as to swlngaround the fixed pivot of said link in adirection substantially parallel to that of the braklng thrust, a rollercarried at the free end of a link pivoted'to the rudder bar of thealrplane, and kept in abutting relation with the concave curved side ofsaid beam, by the means transmitting the primary braking thrust, by theintermediary of a plate GEORGE LOUIS RENE JEAN MESSIER.

trolled by the steering device. of the vehicle,

for var. in the position of the power oint of application of the primarybraking t rust according to the position of said steering device. I

3. Brake-thrust distributor of the divided beam type for'airplanes-undercarriage, comprising a' divided curved beam connected byits two ends'to the respective brakes of the two wheels of saidundercarriage and pivoted by its. middle to a link pivotally mounted onthe chassis of'said undercarriage so as to swing around the fixed pivotof said link in a direction substantially parallel to that of thebraking thrust, a roller carried at the free end .of a link articulatedto. the means transmitting the primary braking thrust and 4 kept inabutting relation with the concave curved side of said beam by saidmeans and a rod pivoted'to said last link and mechanically connected tothe rudder bar of the airplane so as to vary the position of said rolleron said concave surface of the beam according to the position of saidrudder bar.

4. Brake-thrust distributor of the divided

